Caixjclating machine



Oct. 17, 1939. G. c. CHASE I CALCULATING MACHINE 5 Sheets-Sheet 1 Original Filed Nov. 27, 1935 I INVENTOR Y m ATTORNEY Oct. 17, 1939.

G. c. CHASE CALCULATING MACHINE Original Filed Nov. 27, 1955 5 Sheets-Sheet 2 INVENTOR or a CC7 ase BY {5% ATTORNEY Oct. 17, .1939. Q Q CHASE 2,176,205

' CALCULATING MACHINE Original Filed Nov. 27, 1935 Sheets-Sheet 3 Q W/ k lNVENTOR 420/ e C$Cha5 M1, ATTORNEY Oct. 17, 1939. G c, CHASE 2,176,205

' CALCULATING MACHINE Original Filed Nov. 2'7, 1935 5 Sheets-Sheet 4 INVENTOR Georg s g. Cl a g ATTORNEY I Oct. 17, 1939. s. c. CHASE 2,176,205

CALCULATING MACHINE 5 Sheets-Sheet Original Filed Nov. 2'7, 1935 INVENTOR 5% ATTORNEY Patented Oct. 17, 1939 umrso STATES PATENT OFFICE to Orange,

onroe Calculating Machine Company,

N. J., a corporation of. Delaware Original application November 27,

1935, Serial No. 51,810. Divided and this application January 21, 1938, Serial 4 Claims.

The invention relates to calculating machines and more particularly to operation. control devices therefor, adapted to interrupt the operation of the numeral wheelactuators, the present application having been divided from application Serial No.

51,810, filed November 27, 1935, and entitled Calculating machine.

The invention consists in the novel construction-and combination of parts, as set forth in the appended claims.

In the accompanying drawings illustrating the invention:

Fig. 1 is a right side elevation of a calculating machine embodying the invention, with the casing 15 removed.

Fig. 2 .is an enlarged vertical section of the selector and registering mechanism.

Fig. 3 isa developed cross sectional view through a numeral wheel and its associated driving pinion and tens transfer elements.

Fig. 4 is a side elevation of the numeral wheel and associated parts, with parts shown in section. Fig. 5 is a plan view of certain numeral wheel locating mechanisms. Fig. 6 is a detail face view of a portion of the variable speed drive'gearing.

Fig. 7 is a left side elevation of the machine, with casing removed and with the carriage shown ,in section,

Figs. 8 and 9 are detailed views of parts shown in Figure 7. v

The invention is shown as applied to a reversible cyclecalculating machine which, in order to simplify the disclosure, is operated by means of a reversible crank handle 3. The mechanisms involved are however primarily designed for high speed operation, and it will be obvious that a machine of this kind could be equipped with a motor drive such, for instance, as that disclosed in United States Patent No. 1,566,650, issued to George C. Chase on December 22, 1925.

In the drawings, a reversible crank handle 3 (Fig. 1) has driving connection with a train of gears 4, designed to drive a shaft 5 in one-to-one 45 ratio with said handle. Shaft 5, through one-toone gearing connection (not shown) with shaft 8 (Fig. 7),- operates certain constantly driven portions of the machine, as will later appear, and also provides anintermittent drive for the differ- 50 ential actuators of the machine, by means of a mechanism disclosed in United States Patent No. 1,858,763, issued to George C. Chaseon May 17, 1932. a a.

-It is desired to hold the actuators inactive dur- 55 ing the first quarter cycle of crap); handle movement; to give them a harmonically accelerated and diminished movement during the second and third quarters of the cycle, and to hold them at rest during the final quarter. For this purpose, an elliptic gear 33 fixed upon shaft 5, meshes with 5 an elliptic gear 34 (Figs. 1 and 6) loosely mounted on stud 39 and having planetary gear connection with actuator gear 35 also loosely mounted on stud 39. This connection comprises a pair of fixedly connected planet pinions 36 and 31, eccentrically mounted on the elliptic gear 34, and a sun gear 38 loosely mounted on the stud 39 supporting said elliptic gear. Gear 35 meshes with pinion 31, while sun gear 38 meshes with pinion 36 and also with the teeth of segment 40, having anti-friction 5 roller engagement with a pair of cams 4|, fast upon shaft 5.

Cams 4| are designed to give the desired movement to the gear 35, the elliptic gears 33 and 34 serving to cooperatein the driving of gear 35 and, by approximating the desired drive ratios, to lighten the work of the cams 4 I.

Gear 35 drives pinions 42 and 43, fast upon the hubs of a pair of pinion wire gears 44 and 45 (Fig. 2) extending across the machine. An idler gear 461s interposed between gear and pinion 43, to reverse the direction of rotation of the pinion wire gear relative to the gear 44.

A locator cam I53 is fast with one of the gears 4, and is engaged by the anti-friction roller of a locator arm- I55, exerting pressure upon said cam by means of a spring I 56.

The differential actuator mechanism, shown in Fig. 2, is of the type wherein different gear trains, 49, are engaged selectively with the drive 44 or 45 under the control of settable digit keys I 8 movement being transmitted, during the operation of the machine, from the gear trains 49 to the actuator output gears Bil-and thence to the numeral wheels I3 of the register. This construction forms no part of the present invention, and one of a number of other well known forms of differential actuating mechanism might be employed.

The tens transfer mechanism is of the wheel to wheel type disclosed in the United States patent to Chase No. 1,964,314, issued June 26, 1934. This comprises a direct gearing connection between the numeral wheels of the register, the gearing being of the entocyclic type, distinguishing from epicyclic gearing in that a floating gear is carried in an eccentric orbit within the circumference of an internal gear. Registrations according to the setting of pinions 49 are transmitted to the numeral wheel I3 through gear 80 (Fig. 2), pingears, 35-

mounted floating gear It. The orbital gearing is so designed that for each unit of value selected by the pinions, gear 89 will transmit a four tooth movement or a third of a rotation to the pinion secured to the eccentric hub of floating gear It. This floating gear has external and internal teeth, the latter engaging the teeth of a pinion 29 and the former engaging an internal gear l5, secured to the numeral wheel IS. The floating gear has three more internal teeth than are provided on pinion 26, and three less external teeth than internal gear l5, so that a 120 degree eccentric movement of the floating gear l4 within the gear I! will impart a one tooth movement to the numeral wheel in the well known manner. Geared to each numeral wheel I3 is a plate I6 upon which is mounted a transfer roller l9 movable through the teeth of a star wheel 23, fast with the pinion 29'. This will impart a direct gear movement to the floating gear H, to register the tens transfer.

Plate l6 forms a locking plate acting upon a detent 2'I-,-and thereby upon the star wheel 23, to prevent overthrow of the tens transfer mechanism. Lost motion is taken out of the gear train connection between the numeral wheels, and the tens transfer is completed at the end of each cycle, by means of a series of successively acting alignor cams 29, operating upon the detents 21 through an intermediate member 39. These alignors are secured upon the numeral wheel supporting shaft H, which is driven through gearing 8|, 82, and 83 (Fig. '7), from through shaft 8, previously referred to.

The numeral wheels l3 (together with the usual revolution counting wheels 84) and the related tens transfer mechanism are mounted in a transversely shiftable carriage 2, and in order to hold the. numeral wheel gearing in alignment during a shifting movement of said carriage a comb 85 (Figs. 2 and 5) is provided, through the teeth of which comb the gears l0 pass as they move out of engagement with the gears 89. As the gears ID are moved laterally beyond the base of the-machine, they are locked by the action of spring detents 88. The detents 89 related to the gears III which are in mesh with the gears 80 of the machine are held out of contact with such gears l8 by means of rollers 81 of the detents engaging a track 88 formed by the outer face of the comb 89, which is supported in the base of the machine.

Operation control United States Patent No. 1,544,806, issued to.

George 0. Chase on July 7, 1925,.shows means for interrupting operation of the machine when the registration on the numeral wheels passes from positive to negative or from negative to positive, these means being particularly useful in performing division operations; as set forth in that patent.

When the registration becomes negative, a subtractive tens transfer occurs in the numeral wheel l3 standing at the time immediately to the left of the keyboard, this wheel being moved from 0 to 9 registering position. In the structure disclosed herein this results in the movement of a pin 89 secured in the alignor cam l9 fromthe position shown in full lines in Fig. '7, into the dotted line position. According to Patent No. 1,544,806, it is necessary, at the end 'of a cycle during which the change has occurred, to move a trigger 3| out of engagement with the shoulder of a spring-pressed pawl 25, carried by arm 24,

ions l9 and N (Fig. 3) and the eccentricallynormally held in rearward position by its spring 28. This allows pawl 25 to drop into the path of movement of a shoulder of rock arm 22 which arm is oscillated by means of link 2| and crank arm 29 from the constantly driven shaft 8. Ann 24, thus coupled to arm 22, will be carried forwardly against a fixed stop 32, whereby continued rotation of the machine in either given direction will be prevented. Upon reversal of movement of the crank handle, arm 28 will be allowed to move rearward and pawl 25, engaging the end of trigger 3| will be lifted out of engagement with the shoulder of arm 22, freeing the machine for movement in either desired direction.

In the present structure, however, the direct operation of the trigger 3| by pin 89, as shown in Patent No. 1,544,806, is unsuitable. This is true because there may be sufficient lost motion in the differential gear train to allow a forward whip of the higher order wheels sufficient to bring the pin 99 into engagement with the trigger even though the wheels should not have passed from 0 to 9 or from 9 to 0 registering position.

According to the present invention, therefore. a tripping lever 90 is fulcrumed upon the end of a U-shaped member 9|, having pin and slot connection at 92 with the frame of the machine. Member 9| is raised, against the tension of its spring 98 immediately after the completion of each cycle of operation of the machine, by means full cycle position in either direction of rotation,

while the picking up of tooth 99 by arm 91 provides lost motion upon reversal of the drive and thus prevents movement of lever 93 immediately the rotation of crank handle 3 is started.

Lifting of member 9| by lever 93 will bring the rearward end of lever 9|! into the position occupied by pin 89 when the related numeral wheel stands at 9, and, upward movement of member 9| continuing and lever 90 being in contact with pin 89, a pin in the forward end of lever 90"will lift the trigger 3| and disengage pawl 25, to effect the stop.

In order that the stop may be operated when the registration in the numeral wheels l3 changes from negative to positive, aswell as in the change from positive to negative, above described, means are provided for changing the position of the member 9| at the end of a cycle of additive operation, as compared with the position of said member at. the end of a cycle of subtractive operation. For this purpose an anti-friction roller I02 on the member 9| engages a disc 99, eccentrically mounted on the shaft 8, and having pin and slot connection with one of the gears 83, member 9| being held against the disc under the tension of a spring I00. The pin and slot connection between parts 83 and 99 is so arranged that during additive rotation of the crank handle 3 lever 90 will be carried rearwardly, into the position illustrated in Fig. '7, at the end of each cycle, so that upon the action of tooth-93 on lever 93 the rear end of lever 99 will move to or across the position occupied by pin 89 when the numeral wheel l3 registers 0. On the other hand, in subtractive rotation, of crank handle 3, the pin of gear 03 will be located in the opposite end of the slot of disc 33, so that at the end of a cycle of the crank handle the rear end of lever 30 will be under the pin I! when numeral wheel is in 9 registering position, and the action of tooth 96 will cause the tripping of trigger 3| if the pin 03 is in such position.

Means are shown for setting the automatic stopping mechanism from active to inactive position, this means comprising the lever 303, to which the link 00 is pivoted, said lever being settable in a clockwise direction as viewed in Fig. 7 to bring a reduced portion of the link 95 between the lever 03 and the cooperating portion of member 3|. This will allow movement of lever 93, under the influence of tooth 30, without causing a lifting movement of member 91. Lever 303 is retained in either of its set positions by a spring click 3". v

United States Patent No. 1,566,650, above referred to, shows how this stopping mechanism may be used in a motor driven machine, while United States Patent No. 1,888,161, issued to George C. Chase on November 15, 1932, shows how it may be employed in a full automatic division machine for giving automatic reversal of the drive, together with automatic shifting of the carriage 2 at the proper time. This latter patent also shows means for automatically setting lever 303 into active position when the automatic division lever is moved to begin an operation, and for automatically restoring lever 303 at the end of the division operation, parts 303 and 301 bein similarly numbered in that patent.

United States Patent No. 1,964,211 issued to '-Austin A. Overbury on June' 26, 1934, shows how the above described stop mechanism may be employed to secure full automatic multiplication.

I claim: 1. In a calculating machine having registering units including each a numeral wheel and a gear provided with a projection, cyclic diflferential stopping means active, means for adjusting said control means to contact the projection at one or alternatively at the other of two given radial positions thereof, and means adjustable to render the control means active or inactive.

2. In a calculating machine having a register provided with elements positioned in accordance with the value registered, cyclic differential actuators for said register, means for driving said actuators, and means for selectively determining additive or subtractive registration; automatic stopping means for said driving means, and a control device for said stopping means variably operable according to the determined sign of registration and including elements adapted to cooperate with the register elements in one or alternatively in another value indicating position thereof.

3. In a calculating machine having registering means including each a numeral wheel and a 0 gear provided with a projection, cyclic diiferentlal actuators for said'wheels, and drive means for said actuators; automatic stopping means for drive means, and a control device including an element reciprocated at the end of each actuator cycle in a path intersecting the path of movement of a register unit projection and cooperating with said projection, when the related wheel rests in 9 registering position, to render the stopping means active.

4. In a calculating machine having registering means including each a numeral wheel and a gear provided with a projection, cyclic difierential actuators for said wheels, means for driving said actuators, and means for selectively determining additive or subtractive registration; automatic stopping means for said driving means, and a control device including an element reciprocated at the end of each actuator cycle in a path intersecting the path of movement of a register unit projection and cooperating with the projection to render the stopping means active, and an element operable variably in additive and in subtractive registration to guide the reciprocating element into contact with the register unit projection when the related wheel rests in 0 or in 9 register- 1 

